Sôrô nante kudaranai (2011)

A man thinks he is an actor. He has a part-time job and likes a cute girl at work. He grabs the chance to have sex with her. Premature ejaculation hits, however, as he is taking off his pants. Angry at what has occurred, he decides to train in order for this not to reoccur. He shares an apartment with a friend. The flat-mate is going to help him with his training.